Invention Grant
- Patent Title: Signal processing circuit, solid-state imaging element, and method for controlling signal processing circuit
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Application No.: US15734850Application Date: 2019-03-20
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Publication No.: US11223791B2Publication Date: 2022-01-11
- Inventor: Luonghung Asakura
- Applicant: Sony Semiconductor Solutions Corporation
- Applicant Address: JP Kanagawa
- Assignee: Sony Semiconductor Solutions Corporation
- Current Assignee: Sony Semiconductor Solutions Corporation
- Current Assignee Address: JP Kanagawa
- Agency: Michael Best & Friedrich LLP
- Priority: JPJP2018-113236 20180614,JPJP2018-146731 20180803
- International Application: PCT/JP2019/011780 WO 20190320
- International Announcement: WO2019/239670 WO 20191219
- Main IPC: H04N5/378
- IPC: H04N5/378 ; H04N5/351 ; H04N5/363 ; H04N5/365
Abstract:
In a digital signal processing circuit that performs AD conversion using a comparison device and a counter, the speed of the AD conversion is increased.
An attenuation unit, in a case where the level of an input signal exceeds a predetermined threshold value, attenuates the input signal and outputs it as an output signal. The comparison device compares the output signal with a predetermined reference signal that changes with lapse of time, and outputs the comparison result. The counter counts a count value until the comparison result is inverted and outputs a digital signal indicating the count value. The digital signal processing unit performs multiplication processing on the digital signal.
An attenuation unit, in a case where the level of an input signal exceeds a predetermined threshold value, attenuates the input signal and outputs it as an output signal. The comparison device compares the output signal with a predetermined reference signal that changes with lapse of time, and outputs the comparison result. The counter counts a count value until the comparison result is inverted and outputs a digital signal indicating the count value. The digital signal processing unit performs multiplication processing on the digital signal.
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